Radiography Exam Image Production & Processing 2

Question 1

Which term describes the process of adjusting image brightness and contrast after acquisition in digital radiography?

Accepted Answer

Postprocessing (image manipulation)

Answer

Postprocessing allows digital manipulation of window width and window level after the image is acquired, adjusting contrast and brightness.

Question 2

What does window width (WW) control in digital image display?

Accepted Answer

Image contrast (the range of gray shades displayed)

Answer

Window width determines the range of Hounsfield units (or signal values) mapped to the gray scale, controlling the number of gray shades and thus image contrast.

Question 3

In computed radiography, what material is used in the imaging plate to store the latent image?

Accepted Answer

Photostimulable phosphor (PSP)

Answer

CR imaging plates use photostimulable phosphor (typically europium-doped barium fluorohalide) to trap energy from x-rays as a latent image.

Question 4

What is the effect of increasing SID on radiographic magnification?

Accepted Answer

Magnification decreases

Answer

Increasing SID reduces magnification because the object is a smaller proportion of the total source-to-image distance.

Question 5

Which grid ratio produces the greatest cleanup of scatter radiation?

Accepted Answer

16:1

Answer

A 16:1 grid ratio provides the most efficient scatter cleanup because the tall, closely spaced grid strips preferentially absorb angled scatter photons.

Radiography Exam Practice Test

Radiography Exam Practice Test

Radiography Exam Image Production & Processing 2